Is there any way to view text/html inline *only if* we think text/plain is not right?

[José María Mateos]

Hi everybody,

Lately I've been receiving mail in which the text/plain part and the 
text/html part are at odds. This is typically caused by generator 
software that ignores text/plain, or uses some old version, etc.

Today I changed my settings to view text/html first via w3m, but I'm not 
entirely comfortable with this.

What I'd really like to do is:

1. Display text/plain by default.
2. If I'm not convinced by that version, press some key and then 
text/html is displayed inline (using w3m, lynx, links, or whatever in 
the ~/.mailcap file).
3. If that's still not good enough, use a macro I already have to run 
mutt_bgrun and display that mail using Firefox directly.

I don't know if point 2 is a possibility, to be honest. Does anyone know 
if this can be done?

Thanks a lot,

-- 
José María (Chema) Mateos || https://rinzewind.org